Isoindolino-sulphonylurea compounds



United States Patent 01 hce 3,535,335 Patented Oct. 20, 1970 3,535,335 ISOINDOLINO-SULPHONYLUREA COMPOUNDS Laszlo Beregi, Boulogne, Pierre Hugon, Rueil Malmaison,

and Jacques Duhault, Chatou, France, assignors to Societe en nom Colleclif Science Union et Cie, Societe Francaise de Recherche Medicale Suresnes, France, a

French society No Drawing. Filed July 30, 1968, Ser. No. 748,628 Claims priority, application Great Britain, Aug. 10, 1967,

36,807/ 67 Int. Cl. C07d 27/48 U.S. Cl. 260326.1 3 Claims ABSTRACT OF THE DISCLOSURE N-[4 (/3 2' methoxy-benzamido-ethyl)-benzenesulfonyl]-N-(2-isoindolino)-urea, optionally substituted on the benzamido radical by chlorine. These compounds possess hypoglycemic properties.

The present invention provides isoindolino sulfonylureas of general Formula I:

'wherein X represents a hydrogen or chlorine atom.

The invention also includes the addition salts of the above compounds with suitable acids or bases. Among the CO NH CH. OH. SO. NH Camp i .acids that may be used, there may be mentioned, for example, hydrochloric, hydrobromic, sulfonic, acetic, malonic, maleic, fumaric, tartaric and malic acids. The bases include, for example, alkali metal hydroxides, alkaline earth-metal hydroxides, amino-alcohols such, for example, as l-amino 2 propanol, 2-amino-2-methyl-lpropanol and choline.

The N-arylsulfonyl-N-(2-isoindolino) ureas of the presties, especially hypoglycemic properties, and may be used as medicaments, for example, in the treatment of diabetes. The compounds may be used as such or in the form of pharmaceutical preparations which comprise a compound of the general formula in admixture or conjunction with a pharmaceutically suitable carrier.

The toxicity of these new compounds is very low. No mortality was noted for 48 hours when administered per orally in mice at doses of 3 g./ kg.

The blood sugar lowering activity was shown in the rat and the rabbit. It was noted that the minimal active dose by oral route varies from 1 to 2.5 mg./kg. A lowering of 38% of the blood sugar is obtained with a dose of 5 mgjkg. in the rabbit and of 65% in the rat with mg./ kg. The action of these new compounds is especially long from to 24 hours.

In comparison, tolbutamide, an antidiabetic well known and widely used in human patients, produces at a dose of 25 mg./kg. in the rabbit a reduction of only 19% of the blood sugar, and rug/kg. are needed to obtain a blood sugar reduction of 23% in the rat for a duration not exceeding 15 hours.

The new compounds may be used in human therapy in the treatment of diabetes mellitus at a dose of about 10 to 200 mg., preferably 25 to 75 mg., 1 to 3 times per day. They can be administered per oral, rectal or parenteral route, but preferably p.o. The usual pharmaceutical carriers, as for example, talc, starch, lactose and magnesium stearate are used for the diiterent pharmaceutical forms, such as tablets, dragees, etc. The tolerance of the products is good and no notable side effect is observed.

The following examples illustrate the invention; all parts are given by weight, and melting points are determined by the Kofier test unless othenwise stated.

EXAMPLE 1 N [4-( B-orthomethoxy-benzamido-ethyl) -benzenesulfonyl] -N'-(2-isoindolino -urea OCHs ent invention can be prepared by reacting an arylsulfonylethyl urethane of general Formula II:

wherein X has the values previously defined, with an N- amino-isoindoline, according to the process disclosed by Marshall et al., J. Org. Chem. 23, 927 (1958).

These new compounds and their physiologically tolerable addition salts possess interesting therapeutic proper- N-[4 (,8 orthomethoxybenzamido-ethyl) -benzenesulfonyl]-N-(2-isoindolino) urea melting at 166 C., and according to the micro Koiler test, at 151153 C.

EXAMPLE 2 N- [4- ([3-2'-methoxy-5 '-chl0r0-benzamido-ethyl) benzenesulfonyl] N'-(2-isoindolino)-urea OCHs M.P. 172174 C., M.P. micro Kofler 164l66 C. (methanol), prepared according to the process described in Example 1, starting from N-amino-isoindoline and N- [4-(B-2'-methoxy 5 chloro-benzamidoethyl)-benzenesulfonyl] -ethyl urethane.

Analogous compounds, having the chlorine atom in different positions on the benzene ring of the benzamidoethyl radical, such as the 2'-methoxy-3,4', or 6'-chlorobenzamido-ethyl compounds, are prepared in the same manner, but starting from the appropriately substituted N- [4-(fl-benzamidoethy1)-benzenesulfonyl] ethyl urethane.

Various modifications and equivalents will be apparent to one skilled in the art and may be made in the compounds, compositions, and methods of the present invention without departing from the spirit of scope thereof, and it is therefore to be understood that the invention is to be limited only by the scope of the appended claims.

4 What we claim is: 1. A compound selected from the group consisting of (A) isoindolino sulfonylurea compounds of Formula I l 0 CH3 wherein X is selected from the group consisting of by drogen and chlorine, and (B) physiologically acceptable addition salts thereof with acids or bases.

2. A compound of claim 1 which is N-[4-(fi-2'-methoxy-benzamido-ethyl)-benzenesulfonyl]-N (2 isoindo- 1in0)-urea.

3. A compound of claim 1 which is N-[4-(fi-2'-methoxy- 5 5 chloro-benzamido-ethyl)-benzenesulfonyl]-N' (2- isoindolino -urea.

References Cited UNITED STATES PATENTS 3,475,450 10/1969 Kabbe et a1.

ALEX MAZEL, Primary Examiner J. A. NARCAVAGE, Assistant Examiner 0 U.S. Cl. X.R. 

